Product Description: This part is an electrical transmitter (variable resistor) connected to the transmission shift lever on the 700 R4 transmission. See arrow. As the shift lever is moved from gear to gear, it changes the resistance inside the sending unit. From the changing resistance, an electrical signal is sent from this unit to the microprocessor for the "Dashboard Gauges." The dashboard gauge then displays the selected gear that the transmission is in. For more information click on Dashboard Gauges. Back to Parts